| 摘要 |
Dehydrogenatable hydrocarbons are dehydrogenated by contacting them, at dehydrogenation conditions, with a catalytic composite comprising a combination of catalytically effective amounts of a platinum group component, a Group IV-A metallic component, and a Group VI-B transition metal component with a porous carrier material. A specific example of the nonacidic catalytic composite disclosed herein is a combination of platinum group component, a Group IV-A metallic component, a Group VI-B component, and an alkali or alkaline earth component with a porous carrier material; wherein the components are uniformly dispersed throughout the porous carrier material; wherein substantially all of the platinum group component is present therein in the elemental metallic state and substantially all of the Group IV-A metallic component, the Group VI-B component and the alkali or alkaline earth component are present therein in an oxidation state above the elemental metal; wherein the composite contains, on an elemental basis, about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % Group IV-A metal, about 0.01 to 3 wt. % Group VI-B metal, about 0.1 to about 5 wt. % alkali metal or alkaline earth metal; and wherein the atomic ratio of Group VI-B metal to platinum group metal is about 0.05:1 to about 4:1.
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